The Bangladeshi fishing industry representative, Mushtaq Ahmed, told Agence France-Presse news agency that if these survivors were rescued fishermen, then some 90 would still be missing.

"They could be moored on an island or adrift at sea," he said. "In the past we have seen that most of the fishermen return to their fishing ports within a week or two. We hope this time they will also be back in good health."

He said many of the boats that did return to port had been damaged by the storm.

Around 350,000 people were evacuated from low-lying areas ahead of Cyclone Mora's arrival. A local official said 50,000 homes had been destroyed or damaged by the storm in Cox's Bazar.

The area is home to camps for hundreds of thousands of Muslim Rohingya refugees who have fled violence in neighbouring Myanmar.